Module io.virtdata.api

Package io.virtdata.core

Class DataMapperFunctionMapper

java.lang.Object

io.virtdata.core.DataMapperFunctionMapper

public class DataMapperFunctionMapper
extends java.lang.Object

This class implements an obtuse way of avoiding autoboxing and M:N type mapping complexity by way of doublish dispatch. It was preferred over a more generalized reflection and annotation-based approach. If it gets too verbose, (for some definition of "too"), then it may be refactored.

The primary goal of this approach is to allow for primitive-level lambdas when function are composed together. This will allow for significant performance gains when there are only a few steps in a composed function which are non-primitive, which is the general case.

Composition should be supported between all primitive functions for types listed in TypeMap, as well as generic functions, with generic functions as the last resort.

Constructor Summary

Constructors

Constructor	Description
DataMapperFunctionMapper()

Method Summary

Modifier and Type	Method	Description
static <T> DataMapper<T>	map(java.lang.Object function)
static <R> DataMapper<R>	map(java.util.function.DoubleFunction<R> f)
static DataMapper<java.lang.Integer>	map(java.util.function.DoubleToIntFunction f)
static DataMapper<java.lang.Long>	map(java.util.function.DoubleToLongFunction f)
static DataMapper<java.lang.Double>	map(java.util.function.DoubleUnaryOperator f)
static <R> DataMapper<R>	map(java.util.function.Function<java.lang.Long,R> f)
static <R> DataMapper<R>	map(java.util.function.IntFunction<R> f)
static DataMapper<java.lang.Long>	map(java.util.function.IntToDoubleFunction f)
static DataMapper<java.lang.Long>	map(java.util.function.IntToLongFunction f)
static DataMapper<java.lang.Integer>	map(java.util.function.IntUnaryOperator f)
static <R> DataMapper<R>	map(java.util.function.LongFunction<R> f)
static DataMapper<java.lang.Double>	map(java.util.function.LongToDoubleFunction f)
static DataMapper<java.lang.Integer>	map(java.util.function.LongToIntFunction f)
static DataMapper<java.lang.Long>	map(java.util.function.LongUnaryOperator f)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataMapperFunctionMapper

public DataMapperFunctionMapper()

Method Detail

map

public static <T> DataMapper<T> map(java.lang.Object function)

map

public static <R> DataMapper<R> map(java.util.function.DoubleFunction<R> f)

map

public static DataMapper<java.lang.Integer> map(java.util.function.DoubleToIntFunction f)

map

public static DataMapper<java.lang.Long> map(java.util.function.DoubleToLongFunction f)

map

public static DataMapper<java.lang.Double> map(java.util.function.DoubleUnaryOperator f)

map

public static <R> DataMapper<R> map(java.util.function.IntFunction<R> f)

map

public static DataMapper<java.lang.Long> map(java.util.function.IntToDoubleFunction f)

map

public static DataMapper<java.lang.Long> map(java.util.function.IntToLongFunction f)

map

public static DataMapper<java.lang.Integer> map(java.util.function.IntUnaryOperator f)

map

public static DataMapper<java.lang.Double> map(java.util.function.LongToDoubleFunction f)

map

public static DataMapper<java.lang.Integer> map(java.util.function.LongToIntFunction f)

map

public static DataMapper<java.lang.Long> map(java.util.function.LongUnaryOperator f)

map

public static <R> DataMapper<R> map(java.util.function.LongFunction<R> f)

map

public static <R> DataMapper<R> map(java.util.function.Function<java.lang.Long,R> f)